Trending-skills brreg

Search and retrieve Norwegian company data from Brønnøysundregistrene (the Norwegian Business Registry). Access all ~1.2 million registered companies in Norway.

install

source · Clone the upstream repo

git clone https://github.com/Aradotso/trending-skills

Claude Code · Install into ~/.claude/skills/

T=$(mktemp -d) && git clone --depth=1 https://github.com/Aradotso/trending-skills "$T" && mkdir -p ~/.claude/skills && cp -r "$T/skills/brreg" ~/.claude/skills/aradotso-trending-skills-brreg && rm -rf "$T"

manifest: skills/brreg/SKILL.md

source content

Norwegian Business Registry (Brreg)

Skill by ara.so — Daily 2026 Skills collection

Access the official open API from Brønnøysundregistrene to search and retrieve data about all registered companies in Norway.

When to Use

When the user asks about Norwegian companies
When searching for company information in Norway
When looking up organization numbers (organisasjonsnummer)
When finding companies by name, location, industry, or other criteria
When checking company status (bankruptcy, dissolution, etc.)

API Base URL

https://data.brreg.no/enhetsregisteret/api

Key Endpoints

Search Companies (Enheter)

curl "https://data.brreg.no/enhetsregisteret/api/enheter?navn=SEARCH_TERM&size=20"

Common parameters:

Parameter	Description
`navn`	Company name (partial match)
`organisasjonsnummer`	9-digit org number (comma-separated for multiple)
`organisasjonsform`	Organization type: AS, ENK, NUF, ANS, DA, etc.
`naeringskode`	Industry code (NACE)
`kommunenummer`	4-digit municipality code
`postadresse.postnummer`	Postal code
`forretningsadresse.postnummer`	Business address postal code
`konkurs`	true/false - bankruptcy status
`underAvvikling`	true/false - dissolution status
`registrertIMvaregisteret`	true/false - VAT registered
`fraAntallAnsatte`	Minimum employees
`tilAntallAnsatte`	Maximum employees
`fraRegistreringsdatoEnhetsregisteret`	Registration date from (YYYY-MM-DD)
`tilRegistreringsdatoEnhetsregisteret`	Registration date to (YYYY-MM-DD)
`size`	Results per page (default: 20, max depth: 10000)
`page`	Page number (0-indexed)

Get Company by Org Number

curl "https://data.brreg.no/enhetsregisteret/api/enheter/123456789"

Search Sub-entities (Underenheter)

Branch offices and departments:

curl "https://data.brreg.no/enhetsregisteret/api/underenheter?overordnetEnhet=123456789"

Get Organization Forms

List all valid organization types:

curl "https://data.brreg.no/enhetsregisteret/api/organisasjonsformer"

Common organization forms:

Code	Description
AS	Aksjeselskap (Private limited company)
ASA	Allmennaksjeselskap (Public limited company)
ENK	Enkeltpersonforetak (Sole proprietorship)
NUF	Norskregistrert utenlandsk foretak (Foreign enterprise)
ANS	Ansvarlig selskap (General partnership)
DA	Selskap med delt ansvar (Shared liability partnership)
SA	Samvirkeforetak (Cooperative)
STI	Stiftelse (Foundation)

Get Recent Updates

Track new registrations and changes:

curl "https://data.brreg.no/enhetsregisteret/api/oppdateringer/enheter?dato=2024-01-01T00:00:00.000Z"

Bulk Downloads

Complete datasets (updated nightly ~05:00 AM):

Format	URL
JSON (gzipped)	https://data.brreg.no/enhetsregisteret/api/enheter/lastned
CSV	https://data.brreg.no/enhetsregisteret/api/enheter/lastned/csv
Excel	https://data.brreg.no/enhetsregisteret/api/enheter/lastned/regneark

Example Queries

Find all AS companies in Oslo with 50+ employees

curl "https://data.brreg.no/enhetsregisteret/api/enheter?organisasjonsform=AS&kommunenummer=0301&fraAntallAnsatte=50&size=100"

Search for tech companies

curl "https://data.brreg.no/enhetsregisteret/api/enheter?navn=tech&size=50"

Find companies registered this year

curl "https://data.brreg.no/enhetsregisteret/api/enheter?fraRegistreringsdatoEnhetsregisteret=2024-01-01&size=100"

Get all subsidiaries of a company

curl "https://data.brreg.no/enhetsregisteret/api/underenheter?overordnetEnhet=923609016"

Response Format

Responses are in HAL+JSON format with

_embedded

containing results and

page

containing pagination info:

{
  "_embedded": {
    "enheter": [
      {
        "organisasjonsnummer": "123456789",
        "navn": "Company Name AS",
        "organisasjonsform": {
          "kode": "AS",
          "beskrivelse": "Aksjeselskap"
        },
        "antallAnsatte": 50,
        "forretningsadresse": {
          "adresse": ["Street 1"],
          "postnummer": "0150",
          "poststed": "OSLO",
          "kommune": "OSLO",
          "kommunenummer": "0301"
        },
        "naeringskode1": {
          "kode": "62.010",
          "beskrivelse": "Programmeringstjenester"
        }
      }
    ]
  },
  "page": {
    "size": 20,
    "totalElements": 150,
    "totalPages": 8,
    "number": 0
  }
}

Notes

API is free and open (NLOD license)
No authentication required for public data
Rate limiting may apply for heavy usage
Results limited to 10,000 per query (use bulk downloads for complete data)
Data updated continuously during business hours

Documentation

Official API docs: https://data.brreg.no/enhetsregisteret/api/dokumentasjon/en/index.html
OpenAPI spec: https://raw.githubusercontent.com/brreg/openAPI/master/specs/enhetsregisteret.json